基于特征气体的高压电缆缓冲层烧蚀缺陷检测  

Detection of buffer layer ablation defects for high voltage cable based on characteristic gases

作　　者：李森林 陈舒昱 陈奕凯 牛雷 操张鹏 戚梦辉 任成燕[2,3] LI Senlin;CHEN Shuyu;CHEN Yikai;NIU Lei;CAO Zhangpeng;QI Menghui;REN Chengyan(State Grid Anhui Electric Power Research Institute,Hefei 230601,China;Beijing International S&T Cooperation Base for Plasma Science and Energy Conversion,Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]国网安徽省电力有限公司电力科学研究院,安徽合肥230601 [2]等离子体科学和能源转化北京市国际科技合作基地,中国科学院电工研究所,北京100190 [3]中国科学院大学,北京100049

出　　处：《电工电能新技术》2025年第1期108-117,共10页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51977202、52177163);安徽省自然科学基金能源互联网联合基金(2108085UD14)。

摘　　要：近年来,因为高压电缆缓冲层烧蚀导致的电缆运行故障严重危害到电缆系统的安全运行。高压电缆缓冲层材料在烧蚀过程中会产生特征气体,可以基于特征气体检测法实现对缓冲层烧蚀缺陷的预警和诊断。本文搭建了电缆缓冲层放电烧蚀模拟和气体收集实验平台,用不同电极结构模型模拟缓冲层不同缺陷状态,采用气相色谱仪对烧蚀过程中缓冲层的气体进行组分分析,研究产物浓度的演变规律。结果表明缓冲层烧蚀过程中的气体产物包括CO_(2)、H_(2)、CO、低分子量烃类气体等共9种,且各组分气体浓度与缓冲层缺陷类型、烧蚀时间、接触状态等因素直接关联。基于特征气体检测的方法有望应用于高压电缆缓冲层等低场强区潜伏性缺陷的诊断。In recent years,cable failure due to the ablation of the high-voltage cable buffer materials has posed a serious threat to the safe operation of the cable system.The ablation process of buffer materials generates characteristic gases,which enables the prediction and diagnosis of buffer layer defects through characteristic gas detection.The experimental platform was set up to simulate the discharge ablation of the cable buffer layer and to collect gases.Using different structures of electrodes,the experiment of the buffer layer with typical defects was carried out.The gases produced during the discharge and ablation process were analyzed with a gas chromatograph to study the evolution pattern of the product concentrations.The results show that the gas products produced during the buffer layer ablation include nine kinds of gases,such as CO_(2),H_(2),CO and low molecular weight hydrocarbon gases,and the concentrations of different kinds of gases are directly related to the type of buffer layer defect,ablation time,and contact state between the buffer layer and metal sheath.The method based on characteristic gas detection is prospective in diagnosing latent defects in the buffer layer of high-voltage cables.

关 键 词：高压XLPE电缆 缓冲层烧蚀 气体检测 局部放电 

分 类 号：TM247[一般工业技术—材料科学与工程]